1331712155 has 4 divisors (see below), whose sum is σ = 1598054592. Its totient is φ = 1065369720.

The previous prime is 1331712149. The next prime is 1331712181. The reversal of 1331712155 is 5512171331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1331712155 - 2⁶ = 1331712091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133171211 + ... + 133171220.

It is an arithmetic number, because the mean of its divisors is an integer number (399513648).

Almost surely, 2^1331712155 is an apocalyptic number.

1331712155 is a deficient number, since it is larger than the sum of its proper divisors (266342437).

1331712155 is an equidigital number, since it uses as much as digits as its factorization.

1331712155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266342436.

The product of its digits is 3150, while the sum is 29.

The square root of 1331712155 is about 36492.6315165130. The cubic root of 1331712155 is about 1100.1961509709.

Adding to 1331712155 its reverse (5512171331), we get a palindrome (6843883486).

The spelling of 1331712155 in words is "one billion, three hundred thirty-one million, seven hundred twelve thousand, one hundred fifty-five".